2182558

Information

• Patent Grant
• 2182558

• References
• Source

• Patent Number

  2,182,558

• Date Filed

  Not available

• Date Issued

  Tuesday, December 5, 1939
  85 years ago

• CPC

  • E06B7/06 - with one ventilation wing only
  • Y10T74/116 - Clock train

• US Classifications

  • 049 - Movable or removable closures
  • 074 - Machine element or mechanism
  • 454 - Ventilation